Hi fellow collectors.
I am not an expert on Bulgarian helmets, so would appreciate any advice on this model.
I am not sure if it is a M51 or a M51/72 , I am aware there is a difference in shape between these two models of shell, but are there any distinct methods to work out the differences!
Is there a possibility this is a M51 shell, with a M72 liner, as going by the date stamp on the liner obviously it's a later issued model???
Please see below for pictures of my helmet,and finally thanks for looking.